Don't withdraw a loan (7)
I believe the answer is:
advance
'loan' is the definition.
(I know that advance is a type of loan)
'don't withdraw a' is the wordplay.
I cannot quite understand how this works, but
'a' could be 'an' and 'an' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for advance that I've seen before include "Bring forward" , "Move forward like army or loan against wage" , "Lend money on security" , "Forward movement, a change for the better" , "Go forwards" .)